Does this mean we have to start equipping undersea seismic sensors and surface buoys with geiger counters? :(
The issues are so-called hot-spots which cause certain fish to be extremely radioactive and streams causing concentrations of radioactive materials highly contaminating only certain regions and fish.
That being said, there are so many pollutants in the oceans that I'm confused why people are not more outraged about ocean pollution.
Vice Documentary about garbage streams. e.g. https://www.youtube.com/watch?v=D41rO7mL6zM
Finally, its certainly not acceptable to have on-going ocean pollution, which is probably happening in Fukushima Daiichi.